Methods/steps:
1. If the phone can't be turned on, turn it off first, so that the phone can be turned off. Press and hold the power button and the volume+button, and be careful to hold them for a period of time. The mobile phone will enter the brushing state.
2. We need to download the firmware again. We can search for "Meizu mobile phone" on Baidu and enter Meizu official website.
3. Find "Flyme" in Meizu official website interface and click in.
4. Find "Download" on the interface, and click Download to display various models of Meizu mobile phone. Please choose your own model according to your mobile phone. Generally, the stable version is recommended. Select the version to download in the version history.
5. Wait for the download to complete. Connect the computer with the data cable of the mobile phone. The recovery (h) will be displayed on the removable storage device of the computer. Update the downloaded firmware. Bind in Recovery(H), be careful not to decompress.
6. Restart the phone. Continue to press and hold the power button and the volume+button at the same time, enter the brushing state, and check "System Update" and "Clear Data" to start.